Discover domain policy
02The receiver finds a DMARC TXT record for the author domain, with an Organizational Domain fallback.
This guide explains the 2015 publication. Superseded by RFC 9989, RFC 9990, RFC 9991.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 6.6.3 ↗
RFC 7489 · § 6.6.3EXAMPLE
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03
Read effective policy
Apply the discovered policy and applicable subdomain rules.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
DMARC records are published below _dmarc.
- DMARC records are published below _dmarc.
- The record starts with v=DMARC1 and includes a policy p=.
- This RFC’s Organizational Domain algorithm relies on public-suffix information.
Examples are illustrative. Consult the linked RFC and its errata for implementation details.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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